$Chest compression fraction$

CPR consists of cycles of chest compressions and ventilations delivered to the patient to artificially maintain a minimal flow of oxygenated blood to the vital organs, whereas defibrillation consists in the passage of electrical current through the myocardium (cardiac muscle) to terminate certain lethal arrhythmias. The four links of the chain of survival are important, but early CPR and early defibrillation are pivotal for a successful outcome of the patient. The sequence of actions linking a victim of out-of-hospital cardiac arrest with survival is described by the chain of survival, which consists of four independent links: early activation of the emergency medical services, early cardiopulmonary resuscitation (CPR), early defibrillation, and early advanced care. Development of simpler methods to provide feedback on CPR quality could contribute to the widespread of these devices. However, compression rate could be accurately estimated. When a wide variety of patients and rescuers were included, TI could not be used to reliably estimate the compression depth. For that purpose, we retrospectively analyzed three databases of out-of-hospital cardiac arrest episodes. Then, we assessed the feasibility of using the transthoracic impedance (TI) signal acquired through defibrillation pads to provide feedback on chest compression depth and rate. One of the methods, based on the spectral analysis of the acceleration, was particularly accurate in a wide range of conditions. To evaluate the accuracy of the methods, we used episodes of simulated cardiac arrest acquired in a manikin model.

$chest compression fraction$ $chest compression fraction$ $chest compression fraction$

First, we describe and evaluate three methods to compute chest compression depth and rate using exclusively the chest acceleration. This chapter explores new alternatives to provide feedback on the quality of chest compressions during CPR. The use of real-time feedback devices increases adherence to CPR quality guidelines. However, several studies have shown that both professionals and laypeople often apply CPR at improper rates and depths. During cardiopulmonary resuscitation (CPR), chest compression quality is the key for patient survival.

$Chest compression fraction$